Archaeologists uncovered the tomb dating from the fifth century BC in an industrial zone in the small town of Lavau, in France’s Champagne region. Inrap, which routinely scours construction sites in order to find and preserve the country’s archaeological heritage, began excavating at Lavau site in October 2014.

A 40-metre-wide burial mound of the Celtic ruler crowns a larger funeral complex, which archaeologists said preceded the royal’s final resting place, and could have first been built during the Bronze Age.

The prince was buried with his prized possessions, which archaeologists said were still being unearthed.

The most exciting find has been a large bronze-decorated cauldron that was used to store watered-down wine. Inrap said it appears to have been made by Etruscan craftsmen in what is now northern Italy.

Buried inside the cauldron was a surprisingly-well preserved ceramic wine pitcher made by Greeks.

The pieces “are evidence of the exchanges that happened between the Mediterranean and the Celts,” Inrap president Dominique Garcia recently told journalists on a field visit.

Garcia said the end of the sixth and beginning of the fifth centuries BC were characterised by the rise of Etruscan and Greek city states like Marseille in southern France.

Mediterranean merchants, seeking slaves, metals and other precious goods, opened trading channels with continental Celts, and often presented ornate goods as “a kind of diplomatic gifts” to local leaders, Garcia said.

German archeologists have unearthed a 2,600-year-old Celtic tomb containing a treasure of jewellery made of gold, amber and bronze.

The subterranean chamber measuring four by five meters was uncovered near the prehistoric Heuneburg hill fort near the town of Herbertingen in south-western Germany. Its contents including the oak floor of the room are unusually well preserved. The find is a “milestone for the reconstruction of the social history of the Celts,” archeologist Dirk Krausse, the director of the dig, said on Tuesday.

The intact oak should allow archeologists to ascertain the precise age of the tomb through tree-ring dating. This is rarely possible with Celtic finds because the Celts left behind no writings and their buildings, usually made from wood and clay, have long since crumbled away.

Krausse said the artefacts found suggest that a woman from the Heuneburg aristocracy was buried there, but added that laboratory tests will need to be conducted to be certain. Only a small part of the chamber has so far been examined.

The entire room weighing some 80 tons was lifted by two cranes onto a flatbed truck and taken to a research facility in Ludwigsburg on Tuesday. The results of the analysis will be presented in June 2011, researchers said.

Heuneburg is regarded as one of the most important Celtic settlements and was a vital trading center during the period between 620 and 480 BC. Intensive excavation has taken place at the site since 1950. Other tombs found at Heuneburg over the decades had already been plundered.

The tomb and the objects are to go on show in an exhibition in Stuttgart in 2012.